Lamp base



FIG. 1 is a perspective and front view of a lamp base showing my new design;

FIG. 2 is a perspective view from behind thereof;

FIG. 3 is a top view, identical to a bottom view thereof due to symmetry;

FIG. 4 is a left side view, identical to a right side view thereof due to symmetry;

FIG. 5 is a front view thereof;

FIG. 6 is a back view thereof;

FIG. 7 is a perspective view from behind thereof, with a handle in an upright position;

FIG. 8 is a perspective and front view of the lamp base fitted with a first shade;

FIG. 9 is a perspective view from behind thereof;

FIG. 10 is left side view, identical to a right side view, a top view, and a bottom view thereof due to symmetry;

FIG. 11 is a front view thereof;

FIG. 12 is a back view thereof;

FIG. 13 is a perspective view of the lamp base with the first shade in a detached position;

FIG. 14 is a perspective and front view of the lamp base fitted with a second shade;

FIG. 15 is left side view, identical to a right side view, a top view, and a bottom view thereof due to symmetry;

FIG. 16 is a front view thereof;

FIG. 17 is a back view thereof; and,

FIG. 18 is a perspective view of the lamp base with the second shade in a detached position.

Broken lines are for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a lamp base, as shown and described. 